High genetic diversity in cultivated soils can be due to high demand for nitrogen by the plants, which in turn stimulate
nodulation resulting in rhizobia proliferation [45].
R.sullae is characterized by the production of high molecular weight and low molecular weight EPS, the latter having a structure rich in fucose (30%), which increases the
nodulation efficiency in the species.
Some micronutrient preparations are acidic and therefore likely to cause reduced
nodulation effectiveness.
Smith, "Bradyrhizobium japonicum mutants allowing improved
nodulation and nitrogen fixation of field-grown soybean in a short season area," Journal of Agricultural Science, vol.
The lipochitin oligosaccharides, the specific signaling molecules, initiate the process of host plant
nodulation. Nod factors trigger the series of responses of legume plants such as deformation of root hairs, formation of infectious threads (cytoplasmic bridge), and division of cortical cells, leading to nodules formation [3, 4].
Upon reinoculation of the host plant, all the isolates from Kisumu and four from MMUST initiated
nodulation (Figure 1) and were hence confirmed as root-nodule bacteria.
Leguminous plants and rhizobia maintain a symbiotic relationship, where the rhizobium cannot bring about
nodulation and nitrogen fixation without a supply of photosynthates from the host plants.
(2001) Potential for enhancement of root growth and
nodulation of soybean coinoculated with Azospirillum and Bradyrhizobium in laboratory systems.